Optional update for ninja

This update for ninja to version 1.7.2 fixes the following issues:

This version is an updated build dependency for Chromium (bsc#1055189 fate#323787)

- Ship macros.ninja in %{_rpmconfigdir}/macros.d, as used by meson.
- various small updates and improvements

This update was imported from the SUSE:SLE-12-SP2:Update update project.

Fixed bugs
bnc#1055189
[TRACKERBUG] FATE#323787: [ECO] Update ninja to newer version than 1.7.0
Selected Binaries
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